[Data2Vec] Add data2vec vision (#16760)

* save intermediate

* add vision

* add vision

* save

* finish models

* finish models

* continue

* finish

* up

* up

* up

* tests all pass

* clean up

* up

* up

* fix bugs in beit

* correct docs

* finish

* finish docs

* make style

* up

* more fixes

* fix type hint

* make style

* Apply suggestions from code review

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* Update tests/data2vec/test_modeling_data2vec_vision.py

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>

* fix test

Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

docs/source/en/index.mdx

@@ -190,6 +190,7 @@ Flax), PyTorch, and/or TensorFlow.
 |            CTRL             |       ✅       |       ❌       |       ✅        |         ✅         |      ❌      |
 |        Data2VecAudio        |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |        Data2VecText         |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
+|       Data2VecVision        |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |           DeBERTa           |       ✅       |       ✅       |       ✅        |         ✅         |      ❌      |
 |         DeBERTa-v2          |       ✅       |       ❌       |       ✅        |         ✅         |      ❌      |
 |    Decision Transformer     |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |